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257 lines
7.3 KiB
257 lines
7.3 KiB
/* orinoco_pci.c |
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* |
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* Driver for Prism 2.5/3 devices that have a direct PCI interface |
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* (i.e. these are not PCMCIA cards in a PCMCIA-to-PCI bridge). |
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* The card contains only one PCI region, which contains all the usual |
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* hermes registers, as well as the COR register. |
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* |
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* Current maintainers are: |
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* Pavel Roskin <proski AT gnu.org> |
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* and David Gibson <hermes AT gibson.dropbear.id.au> |
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* |
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* Some of this code is borrowed from orinoco_plx.c |
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* Copyright (C) 2001 Daniel Barlow <dan AT telent.net> |
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* Some of this code is "inspired" by linux-wlan-ng-0.1.10, but nothing |
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* has been copied from it. linux-wlan-ng-0.1.10 is originally : |
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* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved. |
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* This file originally written by: |
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* Copyright (C) 2001 Jean Tourrilhes <jt AT hpl.hp.com> |
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* And is now maintained by: |
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* (C) Copyright David Gibson, IBM Corp. 2002-2003. |
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* |
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* The contents of this file are subject to the Mozilla Public License |
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* Version 1.1 (the "License"); you may not use this file except in |
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* compliance with the License. You may obtain a copy of the License |
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* at http://www.mozilla.org/MPL/ |
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* |
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* Software distributed under the License is distributed on an "AS IS" |
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See |
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* the License for the specific language governing rights and |
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* limitations under the License. |
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* |
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* Alternatively, the contents of this file may be used under the |
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* terms of the GNU General Public License version 2 (the "GPL"), in |
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* which case the provisions of the GPL are applicable instead of the |
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* above. If you wish to allow the use of your version of this file |
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* only under the terms of the GPL and not to allow others to use your |
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* version of this file under the MPL, indicate your decision by |
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* deleting the provisions above and replace them with the notice and |
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* other provisions required by the GPL. If you do not delete the |
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* provisions above, a recipient may use your version of this file |
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* under either the MPL or the GPL. |
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*/ |
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#define DRIVER_NAME "orinoco_pci" |
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#define PFX DRIVER_NAME ": " |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/delay.h> |
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#include <linux/pci.h> |
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#include "orinoco.h" |
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#include "orinoco_pci.h" |
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/* Offset of the COR register of the PCI card */ |
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#define HERMES_PCI_COR (0x26) |
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/* Bitmask to reset the card */ |
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#define HERMES_PCI_COR_MASK (0x0080) |
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/* Magic timeouts for doing the reset. |
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* Those times are straight from wlan-ng, and it is claimed that they |
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* are necessary. Alan will kill me. Take your time and grab a coffee. */ |
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#define HERMES_PCI_COR_ONT (250) /* ms */ |
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#define HERMES_PCI_COR_OFFT (500) /* ms */ |
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#define HERMES_PCI_COR_BUSYT (500) /* ms */ |
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/* |
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* Do a soft reset of the card using the Configuration Option Register |
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* We need this to get going... |
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* This is the part of the code that is strongly inspired from wlan-ng |
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* |
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* Note : This code is done with irq enabled. This mean that many |
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* interrupts will occur while we are there. This is why we use the |
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* jiffies to regulate time instead of a straight mdelay(). Usually we |
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* need only around 245 iteration of the loop to do 250 ms delay. |
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* |
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* Note bis : Don't try to access HERMES_CMD during the reset phase. |
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* It just won't work ! |
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*/ |
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static int orinoco_pci_cor_reset(struct orinoco_private *priv) |
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{ |
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struct hermes *hw = &priv->hw; |
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unsigned long timeout; |
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u16 reg; |
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/* Assert the reset until the card notices */ |
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hermes_write_regn(hw, PCI_COR, HERMES_PCI_COR_MASK); |
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mdelay(HERMES_PCI_COR_ONT); |
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/* Give time for the card to recover from this hard effort */ |
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hermes_write_regn(hw, PCI_COR, 0x0000); |
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mdelay(HERMES_PCI_COR_OFFT); |
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/* The card is ready when it's no longer busy */ |
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timeout = jiffies + msecs_to_jiffies(HERMES_PCI_COR_BUSYT); |
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reg = hermes_read_regn(hw, CMD); |
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while (time_before(jiffies, timeout) && (reg & HERMES_CMD_BUSY)) { |
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mdelay(1); |
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reg = hermes_read_regn(hw, CMD); |
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} |
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/* Still busy? */ |
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if (reg & HERMES_CMD_BUSY) { |
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printk(KERN_ERR PFX "Busy timeout\n"); |
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return -ETIMEDOUT; |
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} |
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return 0; |
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} |
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static int orinoco_pci_init_one(struct pci_dev *pdev, |
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const struct pci_device_id *ent) |
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{ |
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int err; |
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struct orinoco_private *priv; |
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struct orinoco_pci_card *card; |
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void __iomem *hermes_io; |
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err = pci_enable_device(pdev); |
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if (err) { |
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printk(KERN_ERR PFX "Cannot enable PCI device\n"); |
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return err; |
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} |
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err = pci_request_regions(pdev, DRIVER_NAME); |
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if (err) { |
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printk(KERN_ERR PFX "Cannot obtain PCI resources\n"); |
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goto fail_resources; |
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} |
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hermes_io = pci_iomap(pdev, 0, 0); |
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if (!hermes_io) { |
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printk(KERN_ERR PFX "Cannot remap chipset registers\n"); |
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err = -EIO; |
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goto fail_map_hermes; |
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} |
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/* Allocate network device */ |
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priv = alloc_orinocodev(sizeof(*card), &pdev->dev, |
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orinoco_pci_cor_reset, NULL); |
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if (!priv) { |
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printk(KERN_ERR PFX "Cannot allocate network device\n"); |
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err = -ENOMEM; |
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goto fail_alloc; |
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} |
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card = priv->card; |
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hermes_struct_init(&priv->hw, hermes_io, HERMES_32BIT_REGSPACING); |
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err = request_irq(pdev->irq, orinoco_interrupt, IRQF_SHARED, |
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DRIVER_NAME, priv); |
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if (err) { |
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printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq); |
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err = -EBUSY; |
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goto fail_irq; |
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} |
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err = orinoco_pci_cor_reset(priv); |
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if (err) { |
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printk(KERN_ERR PFX "Initial reset failed\n"); |
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goto fail; |
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} |
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err = orinoco_init(priv); |
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if (err) { |
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printk(KERN_ERR PFX "orinoco_init() failed\n"); |
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goto fail; |
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} |
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err = orinoco_if_add(priv, 0, 0, NULL); |
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if (err) { |
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printk(KERN_ERR PFX "orinoco_if_add() failed\n"); |
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goto fail_wiphy; |
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} |
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pci_set_drvdata(pdev, priv); |
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return 0; |
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fail_wiphy: |
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wiphy_unregister(priv_to_wiphy(priv)); |
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fail: |
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free_irq(pdev->irq, priv); |
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fail_irq: |
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free_orinocodev(priv); |
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fail_alloc: |
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pci_iounmap(pdev, hermes_io); |
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fail_map_hermes: |
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pci_release_regions(pdev); |
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fail_resources: |
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pci_disable_device(pdev); |
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return err; |
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} |
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static void orinoco_pci_remove_one(struct pci_dev *pdev) |
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{ |
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struct orinoco_private *priv = pci_get_drvdata(pdev); |
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orinoco_if_del(priv); |
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wiphy_unregister(priv_to_wiphy(priv)); |
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free_irq(pdev->irq, priv); |
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free_orinocodev(priv); |
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pci_iounmap(pdev, priv->hw.iobase); |
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pci_release_regions(pdev); |
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pci_disable_device(pdev); |
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} |
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static const struct pci_device_id orinoco_pci_id_table[] = { |
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/* Intersil Prism 3 */ |
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{0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID,}, |
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/* Intersil Prism 2.5 */ |
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{0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID,}, |
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/* Samsung MagicLAN SWL-2210P */ |
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{0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID,}, |
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{0,}, |
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}; |
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MODULE_DEVICE_TABLE(pci, orinoco_pci_id_table); |
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static struct pci_driver orinoco_pci_driver = { |
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.name = DRIVER_NAME, |
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.id_table = orinoco_pci_id_table, |
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.probe = orinoco_pci_init_one, |
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.remove = orinoco_pci_remove_one, |
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.driver.pm = &orinoco_pci_pm_ops, |
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}; |
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static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION |
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" (Pavel Roskin <[email protected]>," |
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" David Gibson <[email protected]> &" |
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" Jean Tourrilhes <[email protected]>)"; |
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MODULE_AUTHOR("Pavel Roskin <[email protected]> &" |
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" David Gibson <[email protected]>"); |
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MODULE_DESCRIPTION("Driver for wireless LAN cards using direct PCI interface"); |
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MODULE_LICENSE("Dual MPL/GPL"); |
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static int __init orinoco_pci_init(void) |
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{ |
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printk(KERN_DEBUG "%s\n", version); |
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return pci_register_driver(&orinoco_pci_driver); |
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} |
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static void __exit orinoco_pci_exit(void) |
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{ |
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pci_unregister_driver(&orinoco_pci_driver); |
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} |
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module_init(orinoco_pci_init); |
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module_exit(orinoco_pci_exit);
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